ELECTRICAL COMPONENT DESCRIPTIONS
B391 4 SM
1.4 ELECTRICAL COMPONENT DESCRIPTIONS
Symbol Name Function Index No.
Motors
M1 Tray Motor Drives all rollers. 5
M2 Tray Lift Motor Drives the paper tray up or down. 6
M3
Rear Fence
Motor
Moves the rear fence to transfer the paper
stack from the paper storage (left) side of the
tray to the paper feed (right) side.
16
Sensors
S1
Right Tray
Paper End
Informs the copier/printer when the paper in
the right side (paper feed side) of the tray has
been used up. If there is a paper stack in the
left side (paper storage side), this is moved
into the right tray. If there is no paper stack in
the left side, paper end is indicated.
8
S2
Relay Detects the copy paper coming to the relay
roller and checks for misfeeds.
10
S3
Upper Limit Detects when the paper is at the correct
paper feed height.
9
S4
Lower Limit Detects when the tray is completely lowered,
to stop the LCT motor.
13
S5
Paper Height
1, 2, 3
Detects the amount of paper remaining in the
right side of the tray.
12
S6
Paper Height
4, 5
Detects the amount of paper remaining in the
left side of the tray.
19
S7
Rear Fence
Home Position
Detects when the rear fence is at H.P.
17
S8 Tray (Switch) Detects whether the tray is correctly set. 2
S9
Side Fence
Open/Closed
Detects whether the side fence is opened on
closed.
11
S10
Rear Fence
Return
Detects when the rear fence has moved the
paper stack from the left side to the right side.
15
S11
Left Tray
Paper End
Informs the copier/printer when there is no
paper in the left side (paper storage side) of
the tray.
18
Solenoids
SOL1
Side Fence Controls open-close movement of the side
fence.
14
Magnetic Clutches
MC1 Paper Feed Drives the paper feed roller. 4
MC2 Relay Drives the relay roller. 3
PCBs
PCB1
Main Controls the LCT and communicates with the
copier/printer.
1
Switches
SW1 Right Cover Detects whether the right cover is open. 20
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